code: def test_simple_equations_to_doxygen_and_back(latex, doxygen):
      assert markdown_to_doxygen(latex) == doxygen
      assert doxygen_to_markdown(doxygen) == latex
  
file_path: jupytext/tests/functional/others/test_doxygen.py
imports: import nbformat
  import pytest
  import jupytext
  from jupytext.cli import jupytext
  from jupytext.compare import compare, compare_notebooks
  from jupytext.doxygen import doxygen_to_markdown, markdown_to_doxygen
label_desc: Use image node_id 3 for calling a global function with example usage: test_simple_equations_to_doxygen_and_back(latex, doxygen) without return types